Portion of a watch case



FIG. 1 is a front perspective view of a portion of a watch case showingmy new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a right side elevation thereof;

FIG. 4 is a left side elevation thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a top plan view thereof.

The broken line showings are environmental only and form no part of theclaimed design.

The ornamental design for a portion of a watch case, as shown anddescribed.